Circuit Board of Graphics Processing Unit and Server System

Abstract

The present disclosure provides a circuit board of a graphics processing unit. A first connector, a second connector, a third connector, a fourth connector, a first switch chip, a second switch chip, a first slot set comprising (M+P) slots, and a second slot set comprising N slots are deployed on the circuit board, wherein N is equal to (M+P). The first switch chip is connected to the first connector, the third connector and M slots in the first slot set, the second switch chip is connected to the fourth connector and N slots in the second slot set, and the second connector is connected to P slots in the first slot set. The first connector is connected to a central processing unit; the second connector is connected to the third connector; and the third connector is connected to the second connector or the fourth connector.

1 . A circuit board of a graphics processing unit, wherein
 a connector set, a switch chip set, and a device slot set are deployed on the circuit board;   the connector set comprises a first connector, a second connector, a third connector, and a fourth connector, the switch chip set comprises a first switch chip and a second switch chip, and the device slot set comprises a first slot set and a second slot set, wherein the first slot set comprises (M+P) device slots, and the second slot set comprises N device slots, N is equal to (M+P);   the first switch chip is connected to the first connector, the third connector, and M device slots in the first slot set via traces of the circuit board respectively, the second switch chip is connected to the fourth connector and the N device slots in the second slot set via the traces of the circuit board respectively, and the second connector is connected to P device slots in the first slot set via the traces of the circuit board;   the first connector is configured to be connected to a first central processing unit; the second connector is configured to be connected to the third connector; the third connector is configured to be connected to the second connector or the fourth connector; the fourth connector is configured to be connected to the third connector or a second central processing unit; and   the device slot set is configured to be connected to the graphics processing unit.   
     
     
         2 . The circuit board according to  claim 1 , wherein the second connector, the third connector and the fourth connector are all board-to-board connectors, the second connector, the third connector and the fourth connector are arranged in a straight line, and face a same direction, and a distance between the second connector and the third connector, and a distance between the third connector and the fourth connector are both a target distance. 
     
     
         3 . The circuit board according to  claim 2 , wherein connectors in the connector set are connected with each other via a connector circuit board, wherein a fifth connector and a sixth connector are deployed on a same side of the connector circuit board, the fifth connector and the sixth connector are connected via a trace of the circuit board, the fifth connector and the sixth connector are both board-to-board connectors, and a distance between the fifth connector and the sixth connector is the target distance. 
     
     
         4 . The circuit board according to  claim 3 , wherein the connector circuit board is configured to slide on the circuit board of the graphics processing unit, to switch between, a connection between the third connector and the second connector, and a connection between the third connector and the fourth connector. 
     
     
         5 . The circuit board according to  claim 3 , wherein the connector circuit board is configured to allow plugging and unplugging operations, to connect the third connector to the second connector, or connect the third connector to the fourth connector. 
     
     
         6 . The circuit board according to  claim 2 , wherein connectors in the connector set are connected with each other via a connection cable comprising two connection heads, wherein a first connection head of the connection cable is connected to the third connector, and a second connection head of the connection cable is configured to be connected to the second connector or the fourth connector. 
     
     
         7 . The circuit board according to  claim 1 , wherein the connection between the second connector and the third connector is configured to form a balanced topology structure or a common topology structure of the graphics processing unit. 
     
     
         8 . The circuit board according to  claim 7 , wherein the second connector is connected to the third connector, and the first connector and the fourth connector are respectively connected to different central processing units, to form the balanced topology structure. 
     
     
         9 . The circuit board according to  claim 7 , wherein the second connector is connected to the third connector, and the first connector and the fourth connector are connected to a same central processing unit, to form the common topology structure. 
     
     
         10 . The circuit board according to  claim 1 , wherein the connection between the third connector and the fourth connector is configured to form a cascade topology structure of the graphics processing unit. 
     
     
         11 . The circuit board according to  claim 10 , wherein the third connector is connected to the fourth connector, and the first connector is connected to the first central processing unit, to form the cascade topology structure. 
     
     
         12 . The circuit board according to  claim 1 , wherein M is equal to (N−1), and P is equal to 1. 
     
     
         13 . The circuit board according to  claim 12 , wherein N is equal to 5. 
     
     
         14 . A server system, comprising: a central processing unit set, a circuit board of a graphics processing unit and a graphics processing unit set, wherein the circuit board of the graphics processing unit is connected between the central processing unit set and the graphics processing unit set;
 a connector set, a switch chip set and a device slot set are deployed on the circuit board of the graphics processing unit, wherein the connector set comprises a first connector, a second connector, a third connector, and a fourth connector, the switch chip set comprises a first switch chip and a second switch chip, and the device slot set comprises a first slot set and a second slot set, wherein the first slot set comprises (M+P) device slots, and the second slot set comprises N device slots, N is equal to (M+P);   the first switch chip is connected to the first connector, the third connector, and M device slots in the first slot set via traces of circuit board respectively, the second switch chip is connected to the fourth connector and the N device slots in the second slot set via the traces of circuit board respectively, and the second connector is connected to P device slots in the first slot set via the traces of the circuit board;   the first connector is configured to be connected to a first central processing unit in the central processing unit set; the second connector is configured to be connected to the third connector; the third connector is configured to be connected to the second connector or the fourth connector; the fourth connector is configured to be connected to the third connector or a second central processing unit in the central processing unit set; and   the device slot set is configured to be connected to a graphics processing unit in the graphics processing unit set.   
     
     
         15 . The server system according to  claim 14 , wherein the second connector is connected to the third connector, the first connector is connected to the first central processing unit in the central processing unit set, and the fourth connector is connected to the second central processing unit in the central processing unit set, to form a balanced topology structure of the graphics processing unit set. 
     
     
         16 . The server system according to  claim 14 , wherein the second connector is connected to the third connector, and the first connector and the fourth connector are both connected to a third central processing unit in the central processing unit set, to form a common topology structure of the graphics processing unit set. 
     
     
         17 . The server system according to  claim 14 , wherein the third connector is connected to the fourth connector, and the first connector is connected to a fourth central processing unit in the central processing unit set, to form a cascade topology structure of the graphics processing unit set. 
     
     
         18 . The server system according to  claim 14 ,
 wherein the server system further comprises a connector circuit board,   wherein the second connector, the third connector and the fourth connector are all board-to-board connectors, the second connector, the third connector and the fourth connector are arranged in a straight line, and face a same direction, and a distance between the second connector and the third connector, and a distance between the third connector and the fourth connector are both a target distance; and   connectors in the connector set are connected with each other via the connector circuit board, wherein a fifth connector and a sixth connector are deployed on a same side of the connector circuit board, the fifth connector and the sixth connector are connected via a trace of the circuit board, the fifth connector and the sixth connector are both board-to-board connectors, and a distance between the fifth connector and the sixth connector is the target distance.   
     
     
         19 . The server system according to  claim 18 , wherein the connector circuit board is configured to slide on the circuit board of the graphics processing unit, to switch between, a connection between the third connector and the second connector, and a connection between the third connector and the fourth connector. 
     
     
         20 . The server system according to  claim 18 , wherein the connector circuit board is configured to allow plugging and unplugging operations, to connect the third connector to the second connector, or connect the third connector to the fourth connector.